<template>
  <div class="login_container">
      <div class="login_box">
      <div class="avatar_box">
          <img src="@/assets/logo.png" alt="">
      </div>
      <!-- 登录表单区域 -->
      <el-form label-width="0px" class="login_from" ref="loginFormRef" :model="loginFrom" :rules="loginFromRules">
        <!-- 用户名 -->
        <el-form-item  prop="username">
          <el-input v-model="loginFrom.username" prefix-icon="el-icon-user-solid"  placeholder="请输入用户名"></el-input>
        </el-form-item >
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginFrom.password" prefix-icon="el-icon-lock" placeholder="请输入密码"  type="password"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">立即创建</el-button>
          <el-button @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
      </div>
  </div>
</template>
<script>
    export default{
        name:"Login",
        data(){
            return{
              // 登录表单的数据
              loginFrom:{
                username:'admin',
                password:'123456',
              },
              // 验证表单的登录校验
              loginFromRules:{
                // 验证用户名是否合法
                username:[
                   { required: true, message: '请输入登录名称', trigger: 'blur' },
                   { min: 3, max: 8, message: '长度在 3 到 8 个字符', trigger: 'blur' }
                ],
                // 验证密码是否合法
                password:[
                   { required: true, message: '请输入密码', trigger: 'blur' },
                   { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }
                ]
              }
            }
        },
        methods:{
          // 重置表单
          resetLoginForm(){
            console.log(this)
            this.$refs.loginFormRef.resetFields()
          },
          // 提交 表单
          login(){
            this.$refs.loginFormRef.validate((valid)=>{
              // console.log(valid)
              if(!valid)return;
              this.axios.post('login',this.loginFrom).then(res=>{
                console.log(res)
                if(res.data.meta.status !== 200){
                  this.$message.error(res.data.meta.msg);
                }else if(res.data.meta.status ==200){
                 this.$message.success(res.data.meta.msg);
                 console.log(res)
                //  将登录成功之后的token保存到sessionStorage里
                 window.sessionStorage.setItem('token',res.data.data.token);
                //  解释：首先，要把服务器颁发的token信息计入到sessionStorage里，因为后期接口都需要通过登录之后
                // 才能访问成功，那么记录token就是为在访问那些权限的接口的时候提供一个身份验证的信息
                 this.$router.push('/home')
                }
              })
            })
          }
        }
    }
</script>
<style lang="less" scoped>
.login_container{
    background:#2b4b6b;
    height:100%;
    position:relative;
    .login_box{
        width:450px;
        height:300px;
        background:#fff;
        border-radius:5px;
        position:absolute;
        left:50%;
        top: 50%;
        transform:translate(-50%,-50%);
    }
    .avatar_box{
        width:130px;
        height:130px;
        border:1px solid #eeee;
        border-radius:50%;
        padding:10px;
        box-shadow:0 0 10px #ddd;
        position:absolute;
        left:50%;
        transform:translate(-50%,-50%);
        img{
            width:100%;
            height:100%;
            border-radius:50%;
            background:#eee;
        }
    }
}
.login_from{
  position:absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns{
  display: flex;
  justify-content:flex-end;
}
</style>
